Biologia Plantarum

, Volume 18, Issue 2, pp 147–151 | Cite as

Comparison of the effect of some phenolic compounds on wheat coleoptile section growth with their effect on iaa-oxidase activity

  • Ivana MacháčKOVá
  • Z. Zmrhal


P-coumaric acid (HCA), 2,4-dichlorophenol (DCP) and resorcionol acted as cofactors for IAA-oxidase isolated from young wheat plants. Ferulic acid (FA) and 3,4-dihydroxybenzoic acid (DHBA) induced a lag phase prior to IAA oxidation. HCA, FA (0.2-1 mg ml-1) and DCP (0.03-1 mg ml-1) strongly inhibited wheat coleoptile section growth. DHBA (0.01-1 mg ml-1) slightly stimulated it and resorcinol was without effect. HCA inhibited IAA-induced growth of coleoptile sections and FA stimulated it at low IAA levels and inhibited it at higher ones. DHBA, DCP and resorcinol did not affect IAA-induced growth of coleoptile sections.


Ferulic Acid Section Growth Wheat Coleoptile Resorcin Coleoptile Section 

Abbreviations used


indole-3-acetic acid


p-coumaric acid (4-hydroxycinnamic acid)


ferulic acid(3-methoxy, 4-hydroxyoinnamio acid)




3,4-dihydroxybenzoic acid

Srovnání vlivu některých fenolických ;látek na růst segmentů pšeničných koleoptilí s jejich vlivem na aktivltu IAA-oxidásy.


Kyselina p-kumarová (HCA), 2,4-dichlorfenol (DCP) a resorcin působilyin vitro jako kofaktory IAA-oxidasy isolované z mladých rostlin pšenice. Kyseliny ferulová (FA) a 3,4-dihydroxybenzoová (DHBA) indukovaly před oxidací IAA lag fázi. HCA a FA (0,2-1 mg ml-1) a DCP (0,03-1 mg ml-1) silně inhibovaly růst segmentů pšeničných koleoptilí. DHBA (0,01-1 mg ml-1 jej mírně stimulovala a resoroin jej téměř neovlivnil. HCA brzdila IAA-indukovaný růst segmentů koleoptilí. FA jej při nízkýoh koncentracích IAA stimulovala, ale při vyšších koncentracích IAA brzdila. DHBA, DCP a resorcin neměly na IAA-indukovaný růst segmentů koleoptilí žádný vliv.


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Copyright information

© Institute of Experimental Botany 1976

Authors and Affiliations

  • Ivana MacháčKOVá
    • 1
  • Z. Zmrhal
    • 1
  1. 1.Institute of Plant NutritionResearch Institute of Crop ProductionDrnovská 507Czechoslovakia

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